台风“康森”产生的海洋近惯性能量的数值模拟研究

doi:10.11978/2019073

热带海洋学报 ›› 2020, Vol. 39 ›› Issue (2): 35-43.doi: 10.11978/2019073CSTR: 32234.14.2019073

台风“康森”产生的海洋近惯性能量的数值模拟研究

李娟^1,^2,³(), 刘军亮¹, 蔡树群^1,^3,⁴()

^1. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东广州 510301
^2. 中国科学院大学, 北京 100049
^3. 南方海洋科学与工程广东省实验室(广州), 广东广州 511458
^4. 中国科学院南海生态环境工程创新研究院, 广东广州 510301;

收稿日期:2019-08-16 修回日期:2019-09-25 出版日期:2020-03-10 发布日期:2020-03-10
基金资助:
中国科学院前沿科学重点研究计划(QYZDJ-SSW-DQC034);国家自然科学基金项目(41890851、41430964、41521005、41776005、41406023、41476011);中国科学院南海生态环境工程创新研究院项目(ISEE2018PY05);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0304)

Numerical simulation of oceanic near-inertial energy induced by Typhoon Conson

Juan Li^1,^2,³(), Junliang Liu¹, Shuqun Cai^1,^3,⁴()

^1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
^2. University of Chinese Academy of Sciences, Beijing 100049, China
^3. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
^4. Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China;

Received:2019-08-16 Revised:2019-09-25 Online:2020-03-10 Published:2020-03-10
Supported by:
Key Research Program of Frontier Sciences, Chinese Academy of Sciences(QYZDJ-SSW-DQC034);National Natural Science Foundation of China(41890851、41430964、41521005、41776005、41406023、41476011);Program of Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences(ISEE2018PY05);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(GML2019ZD0304)

摘要/Abstract

摘要：

文章利用经验台风风场模型(TCWPM)和美国环境预测中心的气候预测系统再分析风场资料(NCEP/CFSR)对台风“康森(Conson)”进行数值模拟, 并将模拟的台风带入平板模式(slab model)模拟台风产生的海洋近惯性流。对比实测数据表明, 模拟结果与真实风场、近惯性流场均比较一致, 台风“康森”在近海面的风场不对称结构非常明显, 台风中心两侧的速度大小相差可达10m·s^-1。台风“康森”在台风中心后方产生强烈的海洋近惯性振荡, 且持续时间超过4d。海洋近惯性动能沿着台风路径呈显著的不对称分布, 表明台风“康森”在共振作用下主要在路径右侧激发强烈的近惯性振荡。研究不同强度的热带气旋产生的海洋近惯性能量, 发现热带风暴产生的海洋近惯性能量较小, 平均近惯性动能不超过35J·m^-3。随着气旋强度的增大, 热带气旋激发的近惯性能量呈指数增长, 而台风的影响面积与最大风速半径的变化相对比较一致, 当最大风速半径(R₀)增大一半(1.5R₀)时, 其产生的最大平均近惯性动能从81J·m^-3增大到631J·m^-3, 影响面积从大约600km²增加到大于900km²。

关键词: 台风“康森”, 近惯性动能, 数值模拟, 南海

Abstract:

A Tropical Cyclone Wind Profile Model (TCWPM) and the NCEP/CFSR wind data are used to simulate Typhoon Conson, and a slab model is developed to simulate typhoon-induced oceanic near-inertial currents. The model results match well with both reanalysis data and in situ observations. Typhoon Conson presented a salient asymmetric wind field at the ocean surface, and the bias between the two sides of the wind field along the track reached up to 10 m·s^-1. Typhoon Conson generated strong oceanic near-inertial oscillations (NIOs) after the typhoon center, which lasted for more than four days, and a significant asymmetric distribution of near-inertial kinetic energy (NIKE) indicates the strong NIOs are mainly triggered on the right-hand side of Typhoon Conson under the resonance effect. We also show that the tropical storm yields a small fraction of NIKE, e.g., the mean NIKE does not exceed 35 J·m^-3, but the NIKE increases exponentially with the increasing radius of maximum wind speed (Rmax or R₀), and the influence area increases linearly with Rmax, e.g., when Rmax increases from R₀ to 1.5 R₀, the NIKE rises from 81 to 631 J·m ^-3, and the influence area increases from 600 to more than 900 km².

Key words: typhoon Conson, near-inertial kinetic energy (NIKE), numerical simulation, South China Sea

中图分类号:

P732.42

李娟, 刘军亮, 蔡树群. 台风“康森”产生的海洋近惯性能量的数值模拟研究[J]. 热带海洋学报, 2020, 39(2): 35-43.

Juan Li, Junliang Liu, Shuqun Cai. Numerical simulation of oceanic near-inertial energy induced by Typhoon Conson[J]. Journal of Tropical Oceanography, 2020, 39(2): 35-43.

图/表 8

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试验	最大风速半径/km	最大风速/(m·s^-1)	热带气旋等级	最大平均近惯性动能/(J·m^-3)
Case 1	0.50R₀	30.3	强热带风暴	29.5
Case 2	0.75R₀	30.3	强热带风暴	34.8
Case 3	R₀	35.8	台风	80.8
Case 4	1.25R₀	42.6	强台风	212.0
Case 5	1.50R₀	49.0	强台风	644.2

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台风“康森”产生的海洋近惯性能量的数值模拟研究

Numerical simulation of oceanic near-inertial energy induced by Typhoon Conson

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